Bending machine for angle irons



Sept. 9 1924.

N. KRUMP BENDING MACHINE FOR .ANGLE IROHS led DSC. 23 1922 v2Singin-Shag?. 1

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W/ 'mn/5.56

sept. 9, 1924. 1,501,838

N. KRUMP BENDING MACHINE FOR ANGLE IROHS Filed Dec. 2s, 1922 2 murano, 2

f, lll /A 9F .J4 "rf WI; fr f F Patented Sept. 9, 1924.

,UNITED STATES NIC KRUMP, 0F CI-IICAGrO,` ICLVLINOIS.

BENDING MACHINE ronl Altena rito-irs.

`Application ined December 23, 1922'. Serin N. 608340.

To all whom t may concern.:

Be it known that I, Nro KRUMr, a citizen of the United States, and aresident of Chicago, inthe county of Cook and States. of Illinois,haveinvented certain new anduseful Improvements in a Bending Machine ofor Angle Irons, of which the-following, when taken in connection withthe' drawings accompanying and forming a part hereof, is aspecification. y

This invention relates to a machine for bending angle irons or bars intoa circular form, for use in lmaking tanks, and 'other' articles. y

Among the objects of the invention are' to obtain a bending machine bymeans of'which an angle iron or bar may be bent into circular form, andan angle iron of a different size and thickness' than said first namedangle iron may also be bent into circular form by an adjustment of theco-acting bending rolls ofthe machine5to obtain means to readily andaccurately adjustv said rolls and to maintain them in an adjustedposition, both vertically and horizontally; and tov obf tain a bendingmachine which is 'simple in construction, easily operated, durable, andnot liable to break or get out of order;

In the drawings referredto Fig. l is a top-,plan yview of a machineembodying the invention. i j l Fig. 2 is an end elevatio'nof saidmachine.

Fig. 3 is a verticalsectionon linew' of Fig. l, viewed as indicated byarrows.

Fig, lis a vertical section'on lined-fea of Fig. l viewed as indicatedby arrows.

Fig. 5 .is a vertical section on line 5;'5 of Fig. 1viewed as indicatedbyarrows.v

. A reference character appliedto designate a .given part indicates saidlpart throughout the several figures of the drawings wherever the saineVappears.l h Y A- represents the table of the machine, and a,'a,ftheupper ends of legs supporting the table. C represents a vertical shaftwhichis rotatably mounted in ournal bearing` D. E represents a collarwhichis'rigidly secured on shaft C by'se't nut c. F representsa roll`which'is mounted on'shaft C to be vertically adjustable,` and `toturntherewith. The periphery of rollFO isprovided-with corrugations, (Fig.2), and said roll acts as a driving roll, tov forcethe angle iron orangle bar which is to be curved. through the machine. f, f representsnuts which are setl against'each other on bolt f.

representsafafplate' whichA is secured' on the upper side of` roll F bythe screws f', f. F "represents a washer looselyk mounted on boltv -frepresents a bolt which extends throughbolt' and is'enlarged'at itslower end." The bolt fis split at its lowerend, so that itv is held in'au' adjusted position'4 in shaft C when the bolt f" is drawn upward toset the lower enlarged endthereof inthe split .part of bolt f.. ,FH,represent nuts which are set against; each other to lock bolt f inposition when saidtbolt is -*drawn upward as aboverecite'd.. 'v)UU-"represents the hexagon upper end or head-ofk bolt To adjust roliFvertically on: shaft isY driven `,downy toi release bolt j', and saidboltv f is turned' by plaoinga wrenchonk n head ff thereof, thus raisingor lowering the roll F, as required; said roll resting on the lockednuts f, f and" supported thereby. After saidjroll Fy isadjusted it islocked inposition'by turning 'thelower one of nutsF to bringthe enlargedlower end `of bolt if "firmlyintothefsplit'lowerend` off bolt 7,thenpper one of said nuts F" *1s v then set iirm'ly againstithe lowervone l to locksaid bolt f inf-place. lrlhe-veitical adjustmenty ofroll'F4 is" determined by' the 85 v thickness ofv thehorizontal flangeof--the l angleironv A(orbar)"which is'vbbeing forced through theVmachine', when the bend desired requires'sad fiange'to be underneathsaid y roll: andH said roll is adjusted sothat the l90 p lowerend'there'of elofsefto `table A, when the bend desiredfrequiresfsaidyhorizontal flange' to ber` underneath the hereinafter describedrolls. j

G fepresents a-H l H v is 'rigidly mounted"v onn'shaft C, and-.Hrepresents a drivingv shaft having worm L mounted thereon ,to engage'with said worm wheel G. Jr', hQ-representthe jour-l nal bearingsI ofshaftV H, and said-bearings loo are 'secured tov tlm-3lV underside 'oftable A. I, J", K', respectively represent' roll'sarrang'ed to 'co-actwithroll F,- in; the operation of the machine. Rolls'l, J, K, arerespectively mounted on shaftsz', j, In. Rolls'land J are 105verticallyadjustable on shafts y', in the fsame mannerl as rollV F isadjuseesly on shaft C, and for the same reasons assigned for the"adjustnient.l of said rolly Shaftz' is rigidly mounted in` table' A, andshaft j `is 11o rigidly meemain frame Frame j is movablylmohnted'in'slot or apertureL prov worin gear wheel' which 95 vided therefor intable A. ShaftI Z5 is rigidly mounted in frame s, and said frame ismovably mounted in slot L provided therefor in table A. L is a slotunder slot L, but is not so wide as is said slot L. m represents a boltby means of which the frame la is forced forward into an adjustedposition in slot L; and said frame, after being adjusted as recited, isrigidly held inits adjusted position by the block Z, bolt K and nut K. Mrepresents a spring one end of which abuts against frame y", and theother end against plate m. m represents a bolt by means of which plate mis forced against spring M to control the tension thereof. Roll J lisyieldingly, held against angle iron X by said sprinmM.

Roll K is adjusted vertically on fiaine c, by loosening set screw 7c andraising shaft le, and when the adjustment is made said set screw isagaintightened in collar le to secure the collar in place on shaft 7c.In case the horizontal member of the angle iron which is being bent `isto be on the inside of the curve obtained-the lower end of roll Kis-close to contact with the upper face of the table A, and in case saidhorizontal member is on the outside of said curve it is raised so'astobe in close contact with said horizontal member.V

The function of roll I, when an angle iron or bar is beingy forcedthrough the machine, is to hold said iron or bar in proper position, andthe function of roll J at said time is to hold said iron or bar againstroll F, so that said roll F vwill forcethe iron or bar which is to becurved through the machine. v

N represents a roll which is rotatably mounted in frame a, with itsshaft or axle in a horizontal plane, said frame being positioned inrecess N in table A, and vertically movable, to correspond with thethickness of the horizontal member of the angle iron or bar which isbeing forced through the machine. O represents a wedge which extendsunderneath frame n, the under face of said frame corresponding with theupper face of said wedge, to maintain the shaft or axle ofroll N in ahorizontal plane. O represents a bolt which is illustrated as providedwith groove O. P represents a pin positioned in said groove and driveninto vertical member p at one end .of wedge O, and illustrated asintegral therewith. The turning of bolt O moves the wedge O, to raise orlower fra-me n, as required, to correspond with the thickness of thehorizontal member of the angle iron -orbar which 4is beingv curved.

. Q, ',R, respectively -represent 1 eccentric aiolls,;-zithich arerigidlymeuntedgpn, shafts Of'eslesfai aan@ la waarmee@ hay es or leverswhich are secured in said sia ts or axles and by means of which saideccentrics are forced against the angle iron or bar (X), as said ironor' bar is being forced through the machine. The function of theseeccentrics is to prevent squirming, as it is called, of the angle ironor bar as it is being bent or curved in the machine. When the horizontalmember of said angle ironk or bar is on the outside of the circle orhoop which is being made one ofv said `eccentrics is forced against thevertical member of said iron or bar, and when said horizontal member ison the inside of'said circle or hoop the other of said eccentrics isforced against said vertical member.

The rolls F, l, J, K and N being properly adjusted for a given angleiron or bar, to operate the machine said iron or bar is forced betweenrolls F and J, and shaft H j is rotated, thereby turning roll F, andsaid iron or bar is thereby forced forward to and beyond roll K, and isthereby curved, the amount of said curve being determined by `vtheadjustment of said roll K, relative to roll F.

l claim:

l. ln a machine for bending angle iron, c

a plurality of vertical shafts, one thereof a driving shaft, and aplurality of rolls mounted on said shafts, in combination with means tovertically adjust said rolls, said means comprising a screw threadedhole in the upper ends of said shafts, bolts provided with correspondingscrew threads fitting said screw threaded holes, means to suspend said frolls on said bolts and means to secure said bolts in a determinedposition.

2. In a machine for bending angle iron, a plurality of vertical shafts,one thereof a driving shaft and one rigidlymountedsin on said bolts,plates on said bolts resting on said nuts, and means to secure saidplates to said rolls, and means to secure said bolts j in an adjustedposition. v

3. In a machine for bending angle iron forced therethrough, a table, acorrugated roll, the lower end thereof in spaced relation to said tableand a rotatably mounted ver tical shaft, said roll rigidly secured onsaid shaft, a worm gear. wheel below said ltable rigidly `secured onsaid shaft, an additional analmenteleemte@ met fbi-Warm "Q11nsaid,additigiial shaft arranged] nterm sh ...n .t 5 .e iria-i -'f withsaid worin gear, 1n combination with` a roll rotatably mounted in aframe positioned ina recess in said table, means to adjust said framevertically to maintain said roll in determined spacedrelation to saidlower end of said first named roll, an additional roll mounted on avertical shaft and means to yieldingly hold said additional .roll inspaced relation to said first named roll, means to adjust the tension ofsaid means to yieldingly hold said roll, another and additional rollmounted on a rotatable vertical shaft, and adjustable means to maintainsaid last named roll in determined spaced relation to said first namedroll, a roll mounted on a rigidly positioned shaft, also in spacedrelation` to said first named roll, and eccentrics mounted on horizontalshafts, with means to force said eccentrics into contact with said angleiron which is being forced through the machine.

ff. In a machine for bending angle iron forced therethrough, a table, acorrugated roll, the lower end thereof in spaced relation to said table,a rotatably mounted vertical shaft, said roll rigidly-secured on saidshaft, a worm gear wheel below said table rigidly secured on said shaft,an additional shaft rotatably mounted below said table and a worm onsaid additional shaft arranged to intermesh with said worm gear, incombination with a plurality of additional rolls, one of said additionalrolls rotatably mounted on a rigidly held vertical shaft, another ofsaid additional rolls mounted on a vertical shaft which -is movably`mounted and means to yieldingly hold said last named roll in spacedrelation to said first named roll, and the remaining one of saidadditional krolls rotatably mounted on an adjustably movably mountedshaft, means to adjust and maintain said last named shaft to holdsaid-last named roll in a determined spaced relation to said first namedroll, said table provided with recesses, a vertically movable frame inone of said recesses, a roll rotatably mounted in said last named frame,vand means to adjust and maintain said frame to hold said roll thereinindetermined spaced relation to the lower end of said first named roll,and eccentrics, one thereof-mounted above said table and the other inone of said recesses'in said table, and handles to said eccentricswhereby. they may be forced against an angle iron which is being forcedthrough the machine.

. NIC K12-UMP.

Witnesses f Tios. J. KELLEHER, B. S. BROWN.

